<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
  <style>
    *{
      margin: 0;padding: 0;
    }
    ul{
      margin-top: 100px;
      background-color: beige;
      /* overflow: visible; */
      /* float: left; */
      /* display: block; */
      position: fixed;
    }
    li{
      list-style: none;
      width: 200px;
      height: 50px;
      background-color: chocolate;
      /* float: left; */
      margin-top: 30px;
    }
  </style>
</head>
<body>
  <ul>
    <li>1</li>
    <li>2</li>
    <li>3</li>
  </ul>
</body>
</html>